Run these command on all of your host machines. Don’t reboot the pool master if using pools - change it to a machine that has already rebooted and settled before rebooting the original master.

wget -q -O - http://linux.dell.com/repo/hardware/latest/bootstrap.cgi | bash    
yum install -y dell_ft_install    
yum install -y $(bootstrap_firmware)    
update_firmware --yes

Source

Source